./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:25:09,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:25:09,840 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 18:25:09,848 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:25:09,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:25:09,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:25:09,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:25:09,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:25:09,887 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:25:09,887 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:25:09,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:25:09,888 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:25:09,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:25:09,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:25:09,889 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:25:09,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:25:09,889 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:25:09,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:25:09,889 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:25:09,889 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:25:09,890 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:25:09,891 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:25:09,891 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:25:09,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:25:09,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:25:09,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:25:09,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:25:09,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:25:09,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:25:09,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:25:09,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:25:09,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:25:09,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:25:09,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:25:09,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:25:09,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:25:09,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:25:09,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:25:09,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:25:09,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:25:09,895 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-11-23 18:25:10,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:25:10,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:25:10,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:25:10,192 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:25:10,193 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:25:10,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-23 18:25:13,231 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/data/056c32567/35f14b83841a4f66954810ecb7cf8346/FLAGac0a76bdb [2024-11-23 18:25:13,539 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:25:13,541 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-23 18:25:13,557 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/data/056c32567/35f14b83841a4f66954810ecb7cf8346/FLAGac0a76bdb [2024-11-23 18:25:13,584 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/data/056c32567/35f14b83841a4f66954810ecb7cf8346 [2024-11-23 18:25:13,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:25:13,589 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:25:13,591 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:25:13,591 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:25:13,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:25:13,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:13,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f6ad4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13, skipping insertion in model container [2024-11-23 18:25:13,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:13,624 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:25:13,892 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 18:25:13,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:25:13,915 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:25:13,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:25:13,990 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:25:13,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13 WrapperNode [2024-11-23 18:25:13,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:25:13,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:25:13,993 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:25:13,993 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:25:14,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,047 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 331 [2024-11-23 18:25:14,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:25:14,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:25:14,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:25:14,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:25:14,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,063 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,080 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-23 18:25:14,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,081 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,091 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,098 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,100 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,112 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:25:14,113 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:25:14,113 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:25:14,113 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:25:14,114 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (1/1) ... [2024-11-23 18:25:14,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:25:14,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:14,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:25:14,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:25:14,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:25:14,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:25:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:25:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 18:25:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 18:25:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:25:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:25:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:25:14,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:25:14,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 18:25:14,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 18:25:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-23 18:25:14,182 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-23 18:25:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:25:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:25:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 18:25:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 18:25:14,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:25:14,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:25:14,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:25:14,184 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:25:14,308 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:25:14,309 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:25:15,016 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:25:15,016 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:25:15,656 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:25:15,656 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-23 18:25:15,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:25:15 BoogieIcfgContainer [2024-11-23 18:25:15,656 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:25:15,659 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:25:15,659 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:25:15,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:25:15,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:25:13" (1/3) ... [2024-11-23 18:25:15,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6800261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:25:15, skipping insertion in model container [2024-11-23 18:25:15,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:25:13" (2/3) ... [2024-11-23 18:25:15,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6800261b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:25:15, skipping insertion in model container [2024-11-23 18:25:15,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:25:15" (3/3) ... [2024-11-23 18:25:15,669 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-11-23 18:25:15,688 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:25:15,690 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series2.wvr.c that has 5 procedures, 69 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2024-11-23 18:25:15,690 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:25:15,838 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-23 18:25:15,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 178 flow [2024-11-23 18:25:15,921 INFO L124 PetriNetUnfolderBase]: 7/71 cut-off events. [2024-11-23 18:25:15,924 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 18:25:15,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 71 events. 7/71 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 185 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2024-11-23 18:25:15,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 178 flow [2024-11-23 18:25:15,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 164 flow [2024-11-23 18:25:15,947 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:25:15,970 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9d39700, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:25:15,970 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-23 18:25:15,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:25:15,976 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 18:25:15,976 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:15,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:15,977 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:25:15,977 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:15,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1043750, now seen corresponding path program 1 times [2024-11-23 18:25:15,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:15,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204166223] [2024-11-23 18:25:15,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:15,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204166223] [2024-11-23 18:25:16,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204166223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:16,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:16,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:25:16,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792993383] [2024-11-23 18:25:16,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:16,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:25:16,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:16,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:25:16,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:25:16,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:16,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:16,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:16,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:16,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:18,874 INFO L124 PetriNetUnfolderBase]: 9087/13263 cut-off events. [2024-11-23 18:25:18,874 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-23 18:25:18,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26130 conditions, 13263 events. 9087/13263 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104300 event pairs, 8782 based on Foata normal form. 1/6667 useless extension candidates. Maximal degree in co-relation 24528. Up to 12043 conditions per place. [2024-11-23 18:25:19,022 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-23 18:25:19,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 236 flow [2024-11-23 18:25:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:25:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:25:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-23 18:25:19,036 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-11-23 18:25:19,038 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 164 flow. Second operand 3 states and 124 transitions. [2024-11-23 18:25:19,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 236 flow [2024-11-23 18:25:19,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 220 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-23 18:25:19,085 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 138 flow [2024-11-23 18:25:19,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-23 18:25:19,091 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2024-11-23 18:25:19,092 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 138 flow [2024-11-23 18:25:19,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:19,092 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:19,092 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:25:19,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:25:19,092 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:19,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1043751, now seen corresponding path program 1 times [2024-11-23 18:25:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:19,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85687602] [2024-11-23 18:25:19,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:19,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:19,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85687602] [2024-11-23 18:25:19,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85687602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:19,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:19,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:19,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914890233] [2024-11-23 18:25:19,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:19,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:19,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:19,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:19,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:19,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:19,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:19,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:19,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:19,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:21,563 INFO L124 PetriNetUnfolderBase]: 9088/13266 cut-off events. [2024-11-23 18:25:21,565 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:21,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25630 conditions, 13266 events. 9088/13266 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104144 event pairs, 8782 based on Foata normal form. 0/6666 useless extension candidates. Maximal degree in co-relation 25593. Up to 12056 conditions per place. [2024-11-23 18:25:21,654 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 45 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-23 18:25:21,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 242 flow [2024-11-23 18:25:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-23 18:25:21,658 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-23 18:25:21,658 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 138 flow. Second operand 4 states and 150 transitions. [2024-11-23 18:25:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 242 flow [2024-11-23 18:25:21,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:21,662 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 161 flow [2024-11-23 18:25:21,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-23 18:25:21,663 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -10 predicate places. [2024-11-23 18:25:21,663 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 161 flow [2024-11-23 18:25:21,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:21,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:21,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 18:25:21,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:25:21,667 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:21,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 32357576, now seen corresponding path program 1 times [2024-11-23 18:25:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447548698] [2024-11-23 18:25:21,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:22,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:22,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447548698] [2024-11-23 18:25:22,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447548698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:22,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:22,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:22,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892801618] [2024-11-23 18:25:22,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:22,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:22,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:22,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:22,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:22,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:22,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:22,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:22,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:22,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:23,827 INFO L124 PetriNetUnfolderBase]: 9089/13269 cut-off events. [2024-11-23 18:25:23,828 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:25:23,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25647 conditions, 13269 events. 9089/13269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104251 event pairs, 8782 based on Foata normal form. 0/6668 useless extension candidates. Maximal degree in co-relation 25622. Up to 12055 conditions per place. [2024-11-23 18:25:23,945 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 45 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-11-23 18:25:23,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 271 flow [2024-11-23 18:25:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-23 18:25:23,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4746666666666667 [2024-11-23 18:25:23,948 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 161 flow. Second operand 5 states and 178 transitions. [2024-11-23 18:25:23,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 271 flow [2024-11-23 18:25:23,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:25:23,950 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 195 flow [2024-11-23 18:25:23,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-11-23 18:25:23,953 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -5 predicate places. [2024-11-23 18:25:23,953 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 195 flow [2024-11-23 18:25:23,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:23,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:23,954 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 18:25:23,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 18:25:23,955 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:23,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1003078451, now seen corresponding path program 1 times [2024-11-23 18:25:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:23,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924879819] [2024-11-23 18:25:23,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:24,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:24,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924879819] [2024-11-23 18:25:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924879819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:24,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546221675] [2024-11-23 18:25:24,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:24,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:24,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:24,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:24,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:25:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:24,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:25:24,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:24,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 18:25:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:24,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:25,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546221675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:25,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:25,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 18:25:25,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191806145] [2024-11-23 18:25:25,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:25,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 18:25:25,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:25,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 18:25:25,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:25:25,284 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:25,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 195 flow. Second operand has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:25,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:25,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:25,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:27,015 INFO L124 PetriNetUnfolderBase]: 9089/13268 cut-off events. [2024-11-23 18:25:27,015 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 18:25:27,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25660 conditions, 13268 events. 9089/13268 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104319 event pairs, 8782 based on Foata normal form. 0/6670 useless extension candidates. Maximal degree in co-relation 25632. Up to 12055 conditions per place. [2024-11-23 18:25:27,101 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 44 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-23 18:25:27,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 68 transitions, 293 flow [2024-11-23 18:25:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:25:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:25:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-11-23 18:25:27,103 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44222222222222224 [2024-11-23 18:25:27,104 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 195 flow. Second operand 6 states and 199 transitions. [2024-11-23 18:25:27,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 68 transitions, 293 flow [2024-11-23 18:25:27,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 68 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:25:27,106 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 204 flow [2024-11-23 18:25:27,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-23 18:25:27,107 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2024-11-23 18:25:27,107 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 204 flow [2024-11-23 18:25:27,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.363636363636363) internal successors, (290), 11 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:27,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:27,108 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 18:25:27,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 18:25:27,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:27,313 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:27,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1003088656, now seen corresponding path program 1 times [2024-11-23 18:25:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:27,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513793097] [2024-11-23 18:25:27,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:27,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513793097] [2024-11-23 18:25:27,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513793097] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:27,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:27,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432711210] [2024-11-23 18:25:27,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:27,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:27,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:27,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:27,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:27,702 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:27,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:27,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:27,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:27,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:28,899 INFO L124 PetriNetUnfolderBase]: 9090/13271 cut-off events. [2024-11-23 18:25:28,900 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 18:25:28,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25673 conditions, 13271 events. 9090/13271 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104438 event pairs, 8782 based on Foata normal form. 0/6672 useless extension candidates. Maximal degree in co-relation 25640. Up to 12057 conditions per place. [2024-11-23 18:25:29,021 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 45 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-11-23 18:25:29,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 318 flow [2024-11-23 18:25:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-11-23 18:25:29,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.472 [2024-11-23 18:25:29,026 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 204 flow. Second operand 5 states and 177 transitions. [2024-11-23 18:25:29,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 318 flow [2024-11-23 18:25:29,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 284 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-23 18:25:29,029 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 213 flow [2024-11-23 18:25:29,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-11-23 18:25:29,033 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2024-11-23 18:25:29,034 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 213 flow [2024-11-23 18:25:29,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:29,034 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:29,034 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 18:25:29,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 18:25:29,035 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:29,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:29,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1030892844, now seen corresponding path program 1 times [2024-11-23 18:25:29,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:29,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713658500] [2024-11-23 18:25:29,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:29,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:29,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:29,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713658500] [2024-11-23 18:25:29,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713658500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:29,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193055349] [2024-11-23 18:25:29,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:29,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:29,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:29,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:29,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:25:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:29,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:25:29,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:29,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 18:25:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:29,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:29,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193055349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:29,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:29,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 18:25:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753673304] [2024-11-23 18:25:29,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:29,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:25:29,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:29,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:25:29,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:25:29,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:29,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:29,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:29,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:29,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:31,401 INFO L124 PetriNetUnfolderBase]: 9092/13276 cut-off events. [2024-11-23 18:25:31,401 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-23 18:25:31,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25688 conditions, 13276 events. 9092/13276 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104202 event pairs, 8782 based on Foata normal form. 0/6680 useless extension candidates. Maximal degree in co-relation 25636. Up to 12051 conditions per place. [2024-11-23 18:25:31,502 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 41 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-11-23 18:25:31,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 350 flow [2024-11-23 18:25:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:25:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 18:25:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 283 transitions. [2024-11-23 18:25:31,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4192592592592593 [2024-11-23 18:25:31,505 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 213 flow. Second operand 9 states and 283 transitions. [2024-11-23 18:25:31,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 350 flow [2024-11-23 18:25:31,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:31,507 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 260 flow [2024-11-23 18:25:31,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2024-11-23 18:25:31,508 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2024-11-23 18:25:31,508 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 260 flow [2024-11-23 18:25:31,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:31,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:31,509 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-23 18:25:31,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 18:25:31,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-23 18:25:31,709 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:31,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1895558447, now seen corresponding path program 1 times [2024-11-23 18:25:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:31,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067102067] [2024-11-23 18:25:31,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:32,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067102067] [2024-11-23 18:25:32,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067102067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:32,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450021497] [2024-11-23 18:25:32,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:32,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:32,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:32,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:25:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:32,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:25:32,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:32,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 18:25:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:32,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:25:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:32,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450021497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:25:32,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:25:32,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 18:25:32,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416809647] [2024-11-23 18:25:32,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:25:32,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 18:25:32,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:32,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 18:25:32,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-23 18:25:32,852 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:32,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 260 flow. Second operand has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:32,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:32,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:32,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:34,231 INFO L124 PetriNetUnfolderBase]: 9092/13275 cut-off events. [2024-11-23 18:25:34,231 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-23 18:25:34,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25699 conditions, 13275 events. 9092/13275 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104394 event pairs, 8782 based on Foata normal form. 0/6680 useless extension candidates. Maximal degree in co-relation 25644. Up to 12052 conditions per place. [2024-11-23 18:25:34,315 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 39 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2024-11-23 18:25:34,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 372 flow [2024-11-23 18:25:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:25:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 18:25:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-11-23 18:25:34,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-23 18:25:34,318 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 260 flow. Second operand 7 states and 225 transitions. [2024-11-23 18:25:34,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 372 flow [2024-11-23 18:25:34,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 339 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-23 18:25:34,322 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 261 flow [2024-11-23 18:25:34,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=261, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-11-23 18:25:34,323 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2024-11-23 18:25:34,323 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 261 flow [2024-11-23 18:25:34,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.46153846153846) internal successors, (344), 13 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:34,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:34,324 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:34,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:25:34,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:34,525 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:34,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash 648133166, now seen corresponding path program 1 times [2024-11-23 18:25:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:34,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929314804] [2024-11-23 18:25:34,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:25:34,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:34,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929314804] [2024-11-23 18:25:34,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929314804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:34,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:34,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:25:34,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415006760] [2024-11-23 18:25:34,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:34,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:34,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:34,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:34,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:34,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-23 18:25:34,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:34,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:34,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-23 18:25:34,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:36,377 INFO L124 PetriNetUnfolderBase]: 10043/14828 cut-off events. [2024-11-23 18:25:36,377 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 18:25:36,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28713 conditions, 14828 events. 10043/14828 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 119524 event pairs, 9699 based on Foata normal form. 362/8107 useless extension candidates. Maximal degree in co-relation 25654. Up to 12064 conditions per place. [2024-11-23 18:25:36,442 INFO L140 encePairwiseOnDemand]: 60/75 looper letters, 90 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2024-11-23 18:25:36,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 601 flow [2024-11-23 18:25:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-11-23 18:25:36,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-11-23 18:25:36,444 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 261 flow. Second operand 5 states and 231 transitions. [2024-11-23 18:25:36,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 601 flow [2024-11-23 18:25:36,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 537 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-23 18:25:36,448 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 296 flow [2024-11-23 18:25:36,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-11-23 18:25:36,449 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2024-11-23 18:25:36,449 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 296 flow [2024-11-23 18:25:36,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:36,449 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:36,449 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:36,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 18:25:36,450 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:36,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash -470952134, now seen corresponding path program 1 times [2024-11-23 18:25:36,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:36,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686573049] [2024-11-23 18:25:36,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:36,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:25:36,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:36,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686573049] [2024-11-23 18:25:36,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686573049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:36,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:36,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:36,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978528660] [2024-11-23 18:25:36,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:36,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:25:36,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:36,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:25:36,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:25:36,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:36,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:36,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:36,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:36,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:39,717 INFO L124 PetriNetUnfolderBase]: 28387/40176 cut-off events. [2024-11-23 18:25:39,717 INFO L125 PetriNetUnfolderBase]: For 1720/2700 co-relation queries the response was YES. [2024-11-23 18:25:40,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89088 conditions, 40176 events. 28387/40176 cut-off events. For 1720/2700 co-relation queries the response was YES. Maximal size of possible extension queue 3668. Compared 327581 event pairs, 12977 based on Foata normal form. 0/21731 useless extension candidates. Maximal degree in co-relation 79065. Up to 16428 conditions per place. [2024-11-23 18:25:40,174 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 137 selfloop transitions, 12 changer transitions 0/163 dead transitions. [2024-11-23 18:25:40,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 163 transitions, 806 flow [2024-11-23 18:25:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:25:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:25:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 283 transitions. [2024-11-23 18:25:40,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6288888888888889 [2024-11-23 18:25:40,176 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 296 flow. Second operand 6 states and 283 transitions. [2024-11-23 18:25:40,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 163 transitions, 806 flow [2024-11-23 18:25:40,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 163 transitions, 801 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:40,191 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 340 flow [2024-11-23 18:25:40,191 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=340, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-11-23 18:25:40,192 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 7 predicate places. [2024-11-23 18:25:40,192 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 340 flow [2024-11-23 18:25:40,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:40,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:40,193 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:40,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 18:25:40,193 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:40,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1365782164, now seen corresponding path program 1 times [2024-11-23 18:25:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:40,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874229386] [2024-11-23 18:25:40,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:25:40,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:40,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874229386] [2024-11-23 18:25:40,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874229386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:40,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:40,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:40,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808174521] [2024-11-23 18:25:40,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:40,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:40,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:40,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:40,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:40,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-23 18:25:40,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:40,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:40,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-23 18:25:40,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:43,718 INFO L124 PetriNetUnfolderBase]: 23338/34927 cut-off events. [2024-11-23 18:25:43,718 INFO L125 PetriNetUnfolderBase]: For 5370/5370 co-relation queries the response was YES. [2024-11-23 18:25:43,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78435 conditions, 34927 events. 23338/34927 cut-off events. For 5370/5370 co-relation queries the response was YES. Maximal size of possible extension queue 2916. Compared 304644 event pairs, 22136 based on Foata normal form. 686/20972 useless extension candidates. Maximal degree in co-relation 63001. Up to 27977 conditions per place. [2024-11-23 18:25:43,891 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 88 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2024-11-23 18:25:43,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 672 flow [2024-11-23 18:25:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 225 transitions. [2024-11-23 18:25:43,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-23 18:25:43,893 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 340 flow. Second operand 5 states and 225 transitions. [2024-11-23 18:25:43,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 672 flow [2024-11-23 18:25:43,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 116 transitions, 669 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:25:43,897 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 429 flow [2024-11-23 18:25:43,898 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-23 18:25:43,898 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2024-11-23 18:25:43,899 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 429 flow [2024-11-23 18:25:43,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:43,899 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:43,899 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:43,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 18:25:43,899 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:43,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:43,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1311434886, now seen corresponding path program 1 times [2024-11-23 18:25:43,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:43,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508945033] [2024-11-23 18:25:43,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:43,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:25:44,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:44,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508945033] [2024-11-23 18:25:44,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508945033] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:44,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:44,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993666854] [2024-11-23 18:25:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:44,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:25:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:44,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:25:44,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:25:44,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:44,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 429 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:44,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:44,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:44,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:47,103 INFO L124 PetriNetUnfolderBase]: 17727/26781 cut-off events. [2024-11-23 18:25:47,103 INFO L125 PetriNetUnfolderBase]: For 6272/6272 co-relation queries the response was YES. [2024-11-23 18:25:47,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66181 conditions, 26781 events. 17727/26781 cut-off events. For 6272/6272 co-relation queries the response was YES. Maximal size of possible extension queue 2158. Compared 228727 event pairs, 16757 based on Foata normal form. 0/16542 useless extension candidates. Maximal degree in co-relation 51958. Up to 24071 conditions per place. [2024-11-23 18:25:47,303 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 60 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2024-11-23 18:25:47,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 553 flow [2024-11-23 18:25:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:47,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-11-23 18:25:47,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-23 18:25:47,304 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 429 flow. Second operand 4 states and 143 transitions. [2024-11-23 18:25:47,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 553 flow [2024-11-23 18:25:47,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 548 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:25:47,319 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 428 flow [2024-11-23 18:25:47,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=428, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-11-23 18:25:47,319 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2024-11-23 18:25:47,320 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 428 flow [2024-11-23 18:25:47,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:47,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:47,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:47,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 18:25:47,320 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:47,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:47,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1311434887, now seen corresponding path program 1 times [2024-11-23 18:25:47,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:47,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035110382] [2024-11-23 18:25:47,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:47,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:25:47,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:47,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035110382] [2024-11-23 18:25:47,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035110382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:47,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:47,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:25:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888613940] [2024-11-23 18:25:47,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:47,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:25:47,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:47,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:25:47,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:25:47,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:47,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 428 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:47,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:47,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:47,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:53,167 INFO L124 PetriNetUnfolderBase]: 36711/51254 cut-off events. [2024-11-23 18:25:53,167 INFO L125 PetriNetUnfolderBase]: For 13190/18038 co-relation queries the response was YES. [2024-11-23 18:25:53,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130848 conditions, 51254 events. 36711/51254 cut-off events. For 13190/18038 co-relation queries the response was YES. Maximal size of possible extension queue 3735. Compared 398887 event pairs, 15291 based on Foata normal form. 0/30864 useless extension candidates. Maximal degree in co-relation 106369. Up to 20324 conditions per place. [2024-11-23 18:25:53,439 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 160 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-11-23 18:25:53,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 193 transitions, 1135 flow [2024-11-23 18:25:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:25:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 18:25:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 354 transitions. [2024-11-23 18:25:53,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-23 18:25:53,441 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 428 flow. Second operand 8 states and 354 transitions. [2024-11-23 18:25:53,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 193 transitions, 1135 flow [2024-11-23 18:25:53,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 193 transitions, 1128 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:25:53,455 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 493 flow [2024-11-23 18:25:53,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-11-23 18:25:53,456 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 20 predicate places. [2024-11-23 18:25:53,456 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 493 flow [2024-11-23 18:25:53,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:53,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:53,457 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:53,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 18:25:53,457 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:53,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:53,457 INFO L85 PathProgramCache]: Analyzing trace with hash 728800984, now seen corresponding path program 1 times [2024-11-23 18:25:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:53,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762625755] [2024-11-23 18:25:53,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:25:53,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:53,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762625755] [2024-11-23 18:25:53,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762625755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:53,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:25:53,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:25:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325920961] [2024-11-23 18:25:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:53,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:25:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:53,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:25:53,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:25:53,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:53,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:53,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:53,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:53,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:56,521 INFO L124 PetriNetUnfolderBase]: 17091/25488 cut-off events. [2024-11-23 18:25:56,522 INFO L125 PetriNetUnfolderBase]: For 11533/11533 co-relation queries the response was YES. [2024-11-23 18:25:56,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66967 conditions, 25488 events. 17091/25488 cut-off events. For 11533/11533 co-relation queries the response was YES. Maximal size of possible extension queue 1827. Compared 208298 event pairs, 15535 based on Foata normal form. 0/17789 useless extension candidates. Maximal degree in co-relation 53812. Up to 22975 conditions per place. [2024-11-23 18:25:56,670 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 58 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-11-23 18:25:56,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 86 transitions, 619 flow [2024-11-23 18:25:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:25:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:25:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-23 18:25:56,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2024-11-23 18:25:56,672 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 493 flow. Second operand 5 states and 166 transitions. [2024-11-23 18:25:56,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 86 transitions, 619 flow [2024-11-23 18:25:56,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 86 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:25:56,684 INFO L231 Difference]: Finished difference. Result has 97 places, 86 transitions, 490 flow [2024-11-23 18:25:56,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=97, PETRI_TRANSITIONS=86} [2024-11-23 18:25:56,684 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2024-11-23 18:25:56,684 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 86 transitions, 490 flow [2024-11-23 18:25:56,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:56,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:56,685 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:56,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 18:25:56,685 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:56,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash 728800985, now seen corresponding path program 1 times [2024-11-23 18:25:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:56,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28161513] [2024-11-23 18:25:56,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:56,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:25:57,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28161513] [2024-11-23 18:25:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28161513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415589623] [2024-11-23 18:25:57,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:57,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:57,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:57,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:25:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:57,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 18:25:57,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:25:57,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 18:25:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 18:25:57,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 18:25:57,434 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 18:25:57,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 18:25:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 18:25:57,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 18:25:57,484 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 18:25:57,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 18:25:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:25:57,527 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:25:57,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415589623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:25:57,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:25:57,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2024-11-23 18:25:57,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519048860] [2024-11-23 18:25:57,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:25:57,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:25:57,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:25:57,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:25:57,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:25:57,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:25:57,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 86 transitions, 490 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:57,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:25:57,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:25:57,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:25:59,204 INFO L124 PetriNetUnfolderBase]: 10670/16322 cut-off events. [2024-11-23 18:25:59,204 INFO L125 PetriNetUnfolderBase]: For 8259/8259 co-relation queries the response was YES. [2024-11-23 18:25:59,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42043 conditions, 16322 events. 10670/16322 cut-off events. For 8259/8259 co-relation queries the response was YES. Maximal size of possible extension queue 1121. Compared 130492 event pairs, 9596 based on Foata normal form. 0/12816 useless extension candidates. Maximal degree in co-relation 31013. Up to 14630 conditions per place. [2024-11-23 18:25:59,344 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 61 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2024-11-23 18:25:59,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 84 transitions, 612 flow [2024-11-23 18:25:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:25:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:25:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-23 18:25:59,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-11-23 18:25:59,346 INFO L175 Difference]: Start difference. First operand has 97 places, 86 transitions, 490 flow. Second operand 4 states and 139 transitions. [2024-11-23 18:25:59,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 84 transitions, 612 flow [2024-11-23 18:25:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 84 transitions, 599 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:25:59,354 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 477 flow [2024-11-23 18:25:59,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=477, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-11-23 18:25:59,354 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 19 predicate places. [2024-11-23 18:25:59,355 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 477 flow [2024-11-23 18:25:59,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:25:59,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:25:59,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:25:59,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 18:25:59,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 18:25:59,560 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:25:59,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:25:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash 728800987, now seen corresponding path program 1 times [2024-11-23 18:25:59,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:25:59,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924880178] [2024-11-23 18:25:59,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:59,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:25:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:25:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:25:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924880178] [2024-11-23 18:25:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924880178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:25:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865925860] [2024-11-23 18:25:59,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:25:59,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:25:59,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:25:59,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:25:59,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:25:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:25:59,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:25:59,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:26:00,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:26:00,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-23 18:26:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:26:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865925860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:26:00,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:26:00,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 18:26:00,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393342518] [2024-11-23 18:26:00,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:26:00,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:26:00,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:00,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:26:00,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:26:00,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-23 18:26:00,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 477 flow. Second operand has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:00,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:00,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-23 18:26:00,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:02,145 INFO L124 PetriNetUnfolderBase]: 9324/14788 cut-off events. [2024-11-23 18:26:02,145 INFO L125 PetriNetUnfolderBase]: For 7639/7639 co-relation queries the response was YES. [2024-11-23 18:26:02,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37951 conditions, 14788 events. 9324/14788 cut-off events. For 7639/7639 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 117863 event pairs, 4601 based on Foata normal form. 420/12466 useless extension candidates. Maximal degree in co-relation 30273. Up to 5897 conditions per place. [2024-11-23 18:26:02,277 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 91 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-23 18:26:02,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 130 transitions, 842 flow [2024-11-23 18:26:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:26:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:26:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 261 transitions. [2024-11-23 18:26:02,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-11-23 18:26:02,278 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 477 flow. Second operand 6 states and 261 transitions. [2024-11-23 18:26:02,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 130 transitions, 842 flow [2024-11-23 18:26:02,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 837 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:26:02,293 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 516 flow [2024-11-23 18:26:02,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2024-11-23 18:26:02,294 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 23 predicate places. [2024-11-23 18:26:02,294 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 516 flow [2024-11-23 18:26:02,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:02,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:02,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:02,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 18:26:02,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-23 18:26:02,495 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:26:02,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -238337946, now seen corresponding path program 1 times [2024-11-23 18:26:02,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:02,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131314662] [2024-11-23 18:26:02,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:26:02,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:02,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131314662] [2024-11-23 18:26:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131314662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:26:02,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323360245] [2024-11-23 18:26:02,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:02,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:02,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:26:02,729 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:26:02,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:26:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:02,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:26:02,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:26:02,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:26:03,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-23 18:26:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:26:03,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323360245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:26:03,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:26:03,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 18:26:03,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366623695] [2024-11-23 18:26:03,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:26:03,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:26:03,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:03,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:26:03,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:26:03,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-23 18:26:03,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 516 flow. Second operand has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:03,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:03,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-23 18:26:03,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:05,314 INFO L124 PetriNetUnfolderBase]: 8550/13426 cut-off events. [2024-11-23 18:26:05,315 INFO L125 PetriNetUnfolderBase]: For 9091/9091 co-relation queries the response was YES. [2024-11-23 18:26:05,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35893 conditions, 13426 events. 8550/13426 cut-off events. For 9091/9091 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 104527 event pairs, 4079 based on Foata normal form. 0/11096 useless extension candidates. Maximal degree in co-relation 28650. Up to 4949 conditions per place. [2024-11-23 18:26:05,413 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 101 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-11-23 18:26:05,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 953 flow [2024-11-23 18:26:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:26:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 18:26:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-11-23 18:26:05,415 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5752380952380952 [2024-11-23 18:26:05,415 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 516 flow. Second operand 7 states and 302 transitions. [2024-11-23 18:26:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 953 flow [2024-11-23 18:26:05,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 904 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:26:05,421 INFO L231 Difference]: Finished difference. Result has 103 places, 86 transitions, 535 flow [2024-11-23 18:26:05,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=535, PETRI_PLACES=103, PETRI_TRANSITIONS=86} [2024-11-23 18:26:05,422 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 27 predicate places. [2024-11-23 18:26:05,422 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 86 transitions, 535 flow [2024-11-23 18:26:05,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.333333333333332) internal successors, (364), 12 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:05,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:05,422 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:05,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:26:05,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 18:26:05,623 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:26:05,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:05,623 INFO L85 PathProgramCache]: Analyzing trace with hash -238337945, now seen corresponding path program 1 times [2024-11-23 18:26:05,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:05,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369253133] [2024-11-23 18:26:05,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:05,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 18:26:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:05,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369253133] [2024-11-23 18:26:05,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369253133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:26:05,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:26:05,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:26:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635781324] [2024-11-23 18:26:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:26:05,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:26:05,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:05,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:26:05,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:26:05,761 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:26:05,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 86 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:05,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:05,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:26:05,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:06,883 INFO L124 PetriNetUnfolderBase]: 7110/11106 cut-off events. [2024-11-23 18:26:06,883 INFO L125 PetriNetUnfolderBase]: For 10413/10413 co-relation queries the response was YES. [2024-11-23 18:26:06,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30969 conditions, 11106 events. 7110/11106 cut-off events. For 10413/10413 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 85447 event pairs, 6302 based on Foata normal form. 0/9568 useless extension candidates. Maximal degree in co-relation 24457. Up to 9877 conditions per place. [2024-11-23 18:26:06,958 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 54 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-11-23 18:26:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 84 transitions, 652 flow [2024-11-23 18:26:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:26:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:26:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-11-23 18:26:06,960 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.432 [2024-11-23 18:26:06,960 INFO L175 Difference]: Start difference. First operand has 103 places, 86 transitions, 535 flow. Second operand 5 states and 162 transitions. [2024-11-23 18:26:06,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 84 transitions, 652 flow [2024-11-23 18:26:06,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 84 transitions, 620 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:26:06,965 INFO L231 Difference]: Finished difference. Result has 104 places, 84 transitions, 512 flow [2024-11-23 18:26:06,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=104, PETRI_TRANSITIONS=84} [2024-11-23 18:26:06,966 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 28 predicate places. [2024-11-23 18:26:06,966 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 84 transitions, 512 flow [2024-11-23 18:26:06,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:06,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:06,966 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:06,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-23 18:26:06,967 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:26:06,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash -238337944, now seen corresponding path program 1 times [2024-11-23 18:26:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457616368] [2024-11-23 18:26:06,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:07,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:07,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457616368] [2024-11-23 18:26:07,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457616368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:26:07,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848476393] [2024-11-23 18:26:07,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:26:07,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:26:07,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:26:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:07,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 18:26:07,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:07,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 18:26:07,408 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 18:26:07,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 18:26:07,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 18:26:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:07,503 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:26:07,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848476393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:26:07,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:26:07,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2024-11-23 18:26:07,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703693642] [2024-11-23 18:26:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:26:07,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:26:07,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:07,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:26:07,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-23 18:26:07,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-11-23 18:26:07,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 84 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:07,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:07,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-11-23 18:26:07,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:08,406 INFO L124 PetriNetUnfolderBase]: 4723/7690 cut-off events. [2024-11-23 18:26:08,406 INFO L125 PetriNetUnfolderBase]: For 8241/8241 co-relation queries the response was YES. [2024-11-23 18:26:08,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20762 conditions, 7690 events. 4723/7690 cut-off events. For 8241/8241 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 58309 event pairs, 4115 based on Foata normal form. 444/7241 useless extension candidates. Maximal degree in co-relation 16193. Up to 6665 conditions per place. [2024-11-23 18:26:08,466 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 49 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2024-11-23 18:26:08,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 81 transitions, 619 flow [2024-11-23 18:26:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:26:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:26:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-23 18:26:08,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42933333333333334 [2024-11-23 18:26:08,468 INFO L175 Difference]: Start difference. First operand has 104 places, 84 transitions, 512 flow. Second operand 5 states and 161 transitions. [2024-11-23 18:26:08,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 81 transitions, 619 flow [2024-11-23 18:26:08,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 81 transitions, 598 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-23 18:26:08,473 INFO L231 Difference]: Finished difference. Result has 100 places, 81 transitions, 500 flow [2024-11-23 18:26:08,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=500, PETRI_PLACES=100, PETRI_TRANSITIONS=81} [2024-11-23 18:26:08,473 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 24 predicate places. [2024-11-23 18:26:08,473 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 81 transitions, 500 flow [2024-11-23 18:26:08,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:08,474 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:08,474 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:08,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 18:26:08,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 18:26:08,674 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:26:08,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:08,675 INFO L85 PathProgramCache]: Analyzing trace with hash 651608561, now seen corresponding path program 1 times [2024-11-23 18:26:08,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:08,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674762421] [2024-11-23 18:26:08,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:08,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:08,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:08,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674762421] [2024-11-23 18:26:08,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674762421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:26:08,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690742833] [2024-11-23 18:26:08,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:08,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:08,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:26:08,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:26:08,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:26:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:08,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:26:08,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:09,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:26:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:09,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690742833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:26:09,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:26:09,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 18:26:09,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395486215] [2024-11-23 18:26:09,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:26:09,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:26:09,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:09,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:26:09,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:26:09,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-23 18:26:09,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 81 transitions, 500 flow. Second operand has 12 states, 12 states have (on average 29.916666666666668) internal successors, (359), 12 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:09,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:09,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-23 18:26:09,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:10,699 INFO L124 PetriNetUnfolderBase]: 8666/14494 cut-off events. [2024-11-23 18:26:10,699 INFO L125 PetriNetUnfolderBase]: For 11546/11546 co-relation queries the response was YES. [2024-11-23 18:26:10,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 14494 events. 8666/14494 cut-off events. For 11546/11546 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 120374 event pairs, 5136 based on Foata normal form. 532/13688 useless extension candidates. Maximal degree in co-relation 17444. Up to 5132 conditions per place. [2024-11-23 18:26:10,801 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 120 selfloop transitions, 47 changer transitions 0/186 dead transitions. [2024-11-23 18:26:10,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 1331 flow [2024-11-23 18:26:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 18:26:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 18:26:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 473 transitions. [2024-11-23 18:26:10,803 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5255555555555556 [2024-11-23 18:26:10,803 INFO L175 Difference]: Start difference. First operand has 100 places, 81 transitions, 500 flow. Second operand 12 states and 473 transitions. [2024-11-23 18:26:10,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 1331 flow [2024-11-23 18:26:10,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1297 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:26:10,814 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 832 flow [2024-11-23 18:26:10,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=832, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2024-11-23 18:26:10,815 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 37 predicate places. [2024-11-23 18:26:10,815 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 832 flow [2024-11-23 18:26:10,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.916666666666668) internal successors, (359), 12 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:10,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:10,816 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:10,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 18:26:11,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:11,016 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:26:11,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:11,017 INFO L85 PathProgramCache]: Analyzing trace with hash 966127100, now seen corresponding path program 1 times [2024-11-23 18:26:11,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:11,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921657185] [2024-11-23 18:26:11,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:11,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:26:11,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:11,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921657185] [2024-11-23 18:26:11,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921657185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:26:11,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:26:11,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:26:11,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099131078] [2024-11-23 18:26:11,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:26:11,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:26:11,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:11,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:26:11,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:26:11,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-23 18:26:11,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 832 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:11,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:11,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-23 18:26:11,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:26:12,497 INFO L124 PetriNetUnfolderBase]: 7518/12630 cut-off events. [2024-11-23 18:26:12,497 INFO L125 PetriNetUnfolderBase]: For 14108/14108 co-relation queries the response was YES. [2024-11-23 18:26:12,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34500 conditions, 12630 events. 7518/12630 cut-off events. For 14108/14108 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 98801 event pairs, 3226 based on Foata normal form. 136/11711 useless extension candidates. Maximal degree in co-relation 18280. Up to 5737 conditions per place. [2024-11-23 18:26:12,593 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 105 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-11-23 18:26:12,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 1130 flow [2024-11-23 18:26:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:26:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:26:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-11-23 18:26:12,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-23 18:26:12,595 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 832 flow. Second operand 3 states and 138 transitions. [2024-11-23 18:26:12,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 1130 flow [2024-11-23 18:26:12,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 126 transitions, 1088 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-11-23 18:26:12,605 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 804 flow [2024-11-23 18:26:12,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=804, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2024-11-23 18:26:12,605 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 38 predicate places. [2024-11-23 18:26:12,606 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 804 flow [2024-11-23 18:26:12,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:12,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:26:12,606 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:26:12,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-23 18:26:12,606 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-23 18:26:12,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:26:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash -743591860, now seen corresponding path program 1 times [2024-11-23 18:26:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:26:12,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226717049] [2024-11-23 18:26:12,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:12,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:26:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:12,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:26:12,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226717049] [2024-11-23 18:26:12,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226717049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:26:12,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094044119] [2024-11-23 18:26:12,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:26:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:26:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:26:12,731 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:26:12,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb000e40-6504-45b2-9133-cf3f050c9b86/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:26:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:26:12,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:26:12,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:26:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:12,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:26:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 18:26:13,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094044119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:26:13,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:26:13,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-23 18:26:13,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084375743] [2024-11-23 18:26:13,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:26:13,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:26:13,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:26:13,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:26:13,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:26:13,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-11-23 18:26:13,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 804 flow. Second operand has 12 states, 12 states have (on average 30.083333333333332) internal successors, (361), 12 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:26:13,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:26:13,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-11-23 18:26:13,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand